Wikipedia

NGC 7634

NGC 7634 is a barred lenticular galaxy in the constellation of Pegasus. Its velocity with respect to the cosmic microwave background is 2,844±32 km/s, which corresponds to a Hubble distance of 136.8 ± 9.8 Mly (41.94 ± 2.99 Mpc).[1] However, six non-redshift measurements give a farther mean distance of 175.47 ± 5.89 Mly (53.800 ± 1.805 Mpc).[2] It was discovered by German-British astronomer William Herschel on 26 September 1785.[3][4]

NGC 7634
NGC 7634 imaged by SDSS
Observation data (J2000 epoch)
ConstellationPegasus
Right ascension23h 21m 41.7500s[1]
Declination+08° 53′ 12.704″[1]
Redshift0.017969±0.00000667[1]
Heliocentric radial velocity3,214±19 km/s[1]
Distance175.47 ± 5.89 Mly (53.800 ± 1.805 Mpc)[1]
Group or clusterNGC 7619 group (LGG 473)
Apparent magnitude (V)13.57[1]
Characteristics
TypeSB0[1]
Size~89,900 ly (27.57 kpc) (estimated)[1]
Apparent size (V)1.2′ × 0.9′[1]
Other designations
2MASX J23214177+0853129, UGC 12542, MCG +01-59-062, PGC 71192, CGCG 406-085[1]

NGC 7619 group

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NGC 7634 is a member of the NGC 7619 group (also known as LGG 473). This galaxy group contains at least 25 members, including NGC 7518, NGC 7557, NGC 7562, NGC 7604, NGC 7608, NGC 7610, NGC 7611, NGC 7612, NGC 7619, NGC 7623, NGC 7626, NGC 7631, NGC 7648, IC 1474, and eight others.[5][6]

Supernova

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One supernova has been observed in NGC 7634:

  • SN 1972J (Type I, mag. 15) was discovered by Luisa Pigatto on 13 August 1972.[7][8][9]

See also

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References

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  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 7634". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 29 January 2026.
  2. ↑ "Distance Results for NGC 7634". NASA/IPAC Extragalactic Database. NASA. Retrieved 29 January 2026.
  3. ↑ Herschel, William (1789). "Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London. 79: 212–255. Bibcode:1789RSPT...79..212H. doi:10.1098/rstl.1789.0021.
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 7634". Celestial Atlas. Retrieved 29 January 2026.
  5. ↑ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
  6. ↑ "NAME NGC 7619 Group". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 January 2026.
  7. ↑ Ciatti, F.; Rosino, L. (1977). "Photographic and spectrographic observations of four type I supernovae". Astronomy and Astrophysics. 57: 73. Bibcode:1977A&A....57...73C.
  8. ↑ Pigatto, L. (1972). "Supernova in NGC 7634". International Astronomical Union Circular (2437): 1. Bibcode:1972IAUC.2437....1P.
  9. ↑ "SN 1972J". Transient Name Server. IAU. Retrieved 29 January 2026.
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